Question 7 of 192
Given below are two statements:
Statement I : If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in hot water.
Statement II : If a capillary tube is immersed first in cold water and then in hot water, the height of capillary rise will be smaller in cold water.
In the light of the above statements, choose the most appropriate from the options given below
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Answer: (C) Statement I is true but Statement II is false
For water, the surface tension decreases as the temperature increases. At higher temperatures, the water molecules have more kinetic energy and are better able to overcome the cohesive forces at the surface, resulting in a decrease in surface tension.
So, the height of capillary rise will be smaller in hot water and larger in cold water.
Hence, statement I is true, but statement II is false.
So, the height of capillary rise will be smaller in hot water and larger in cold water.
Hence, statement I is true, but statement II is false.